fix possible boost version conflict
fix possible boost version conflict

ZhouJiaLinmumu/lstm-parser,duncanka/lstm-parser,followyourheart/lstm-parser,duncanka/lstm-parser,danielhers/lstm-parser,clab/lstm-parser,clab/lstm-parser,oplatek/lstm-parser,magic282/lstm-parser,duncanka/lstm-parser,clab/lstm-parser,gouxiayibu/lstm-parser